I would have put Industry Solutions at the left, to show a real spectrum from industry to application to middleware to database to hardware, but this graphic reveals real insight into Oracle's strategy and focus on acquisitions over the past 5 years.The article also points out some interesting analysis of what characterizes a good deal for Oracle. According to Stephen:

At the highest level, the motivations behind Oracle’s largest acquisitions appear to be the following:

This last bullet is something that has played a larger role in really only two of Oracle's acquisitions, both recent, but does two points define a trend? It certainly makes sense and is consistent with speaking points from the company's senior executives.